Suggestions by @colinsilber

Rob Paulsen

as Ratcatcher in Batman: Arkham Unhinged

Score: +1

Mark Hamill

as Scarface in Batman: Arkham Unhinged

Score: +1

Steve Blum

as Killer Croc in Batman: Arkham Unhinged

Score: +1

Maurice LaMarche

as Calendar Man in Batman: Arkham Unhinged

Score: +1

Fred Tatasciore

as Mister Hammer in Batman: Arkham Unhinged

Score: +1

Kari Wahlgren

as Jenna Duffy in Batman: Arkham Unhinged

Score: +1

Peter MacNicol

as Mad Hatter in Batman: Arkham Unhinged

Score: +1

Chris Cox

as Deadshot in Batman: Arkham Unhinged

Score: +1

Nolan North

as Black Mask in Batman: Arkham Unhinged

Score: +1

Wally Wingert

as Riddler in Batman: Arkham Unhinged

Score: +1

JB Blanc

as Bane in Batman: Arkham Unhinged

Score: +2

Matthew Mercer

as Robin in Batman: Arkham Unhinged

Score: +2

Steve Blum

as Sickle in Batman: Arkham Unhinged

Score: +1

Scott Porter

as Nightwing in Batman: Arkham Unhinged

Score: +1

Jules de Jongh

as Vicki Vale in Batman: Arkham Unhinged

Score: +4

Troy Baker

as Two-Face in Batman: Arkham Unhinged

Score: +1

Tasia Valenza

as Poison Ivy in Batman: Arkham Unhinged

Score: +1

Tom Kane

as Quincy Sharp in Batman: Arkham Unhinged

Score: +1

Corey Burton

as Hugo Strange in Batman: Arkham Unhinged

Score: +1

Tara Strong

as Harley Quinn in Batman: Arkham Unhinged

Score: +1